Tutorial, beginner: four intersecting hexagons.
The smallest versions of this shape can be made with a single set.
If the inner layer is made of triangles with 3 balls to each edge, it has 36 balls and subsequent layers each have 24 more balls than the previous layer. A 3 layer implementation needs 36+60+84=180 balls, and so it can be made with a single set of 216.
Two sets would allow a total of 5 layers.

The principle of this method of layering can be extended to many other initial geometries, many of which can be seen on my earlier youtubes, and some of which are quite challenging builds, requiring a lot of magnets